If camp and kitsch aren't your thing, and the Zona Rosa "scene" is just a bit too much, then head to the Centro Histórico, where post-identity politics allow everyone to just be himself/herself/itself at Mezcaleria El Bósforo.
The place is dark, the decor is minimal, the mezcal is strong, the music is just right, and the people resist categorization. It's the perfect place for you if you're not into waving rainbow flags.